इस सीरीज मे अगली संख्या ज्ञात करों?

765, 642, 519, 396, 273 ?

उस वर्ण युग्म का चयन कीजिए, जिसे निम्नलिखित श्रृंखला में प्रश्न चिह्न (? ) से प्रतिस्थापित किया जा सकता है
BA, DC, FE, HG, ? , LK

सिस्मोग्राफी : भूकंप :: टेसियोमीटर : ?

निम्नलिखित में से किसने हाल ही में अपना ऑनलाइन खाद्य और किराना बिक्री उद्यम शुरू किया है?

गीत गोविंद की एक प्रसिद्ध रचना है __

'हलाहल' का विलोम शब्द होगा -

(DIRECTIONS 17): In the following questions, you have brief passages. Read the passages carefully and choose the best answer to each question out of the four alternatives.
Indian airlines had no positive response to the incident occurred in the failure of aeroplane engine.It was 1989 ,Indian airline B059 got crashed in the middle of the Indian ocean,205 passengers were died.There were no clues about the B059 , some says that it got crashed but some said it got lost.Passengers relative were worried about their dear ones. Government decleared the issue of B059 as a priority,Indian navy were given responsibility to find the B059 but nothing was found .After a year some fishermen found the black box of B059, which confirms about the crash of Indian aeroplane B059 due to engine failure.
Who got the responsibility to find out clues about B059?