Directions : In each of the following questions a grammatically correct and meaningful sentence is given with four words given in bold in each. Which of the following words should replace each other to form a meaningful and grammatically correct sentence. The meaning can be different from the one in question. 

The tsunami of 2004 and the (A) threat of piracy in the Indian Ocean provided India an (B)opportunity to test its new posture. Everybody was (C)grateful, but it made no difference to India’s claim to (D)permanent membership.

Identify the segment in the sentence which contains a grammatical error.

There was enough evidence to convict him on selling of fake medicines.

In the following sentence found out whether there is any error in any part of the sentence. If there is error mark your answer letter corresponding to that part a,b,c or d.If there is no error mark your answer ‘e’.

On reaching the (a) / lake, the leader realised (b) / that two elephant from (c) / his herd were missing. (d)/ No error (e) 

The following sentence has been split into segments. One of them may contain an error. Identify the segment that contains a grammatical error. If you don’t find any error, mark ‘No error’ as your answer.

No one were / present when I / entered the hall.

Directions (Q .121 - 125 ): Read each sentence to find out whether there is any . grammatical error or idiomatic error in it. The error, if any, will be in one part of the sentence. The number of that part is the answer. If there is ' No error the answer is (5). (Ignore errors of punctuation if any).

He have started (1) / making a note of (2) / his appointments as (3) / he tends to forget them. (4) / No error (5) 

Identify the segment in the sentence which contains the grammatical error.

If you will bring a letter of introduction, I will consider your request.

Read each sentence to find out whether there is any grammatical error in it. The error if any will be in one part of the sentence, the number of that part will be the answer. If there is ‘No error’ mark (5) as the answer (Ignore errors of punctuation, if any)

The number of flu cases (1) / is decreasing slowly, (2) / thanks to the (3) / timely governmental efforts. (4) No error (5)

Direction : Which of the following phrases (i), (ii), and (iii) given below each sentence should replace the phrase printed in bold letters to make the sentence grammatically correct? Choose the best option among the five given alternatives that reflect the correct use of phrase in the context of the grammatically correct sentence. If the sentence is correct as it is, mark (E) i.e., "No correction required" as the answer.

The strategy of human lockdown is being unprecedented in human history and the World Health Organisation has called it the most “aggressive disease containment effort in history”.
i. Was unprecedented in human history.
ii. Was unprecedented during human history.
iii. Was unprecedented in the history of human beings.