Answer: B) 10 km/hr Explanation: Man's rate in still water = (15 - 2.5) km/hr = 12.5 km/hr. Therefore,  Man's rate against the current = (12.5 - 2.5) = 10 km/hr.

Answer: A) Proteins Explanation: A pulse is an edible seed that grows in a pod. Pulses include all beans, peas, and lentils.Pulses are a great source of protein. This means they can be particularly important for people who do not get protein by eating meat, fish or dairy products.   However, pulses can also be a healthy choice for meat-eaters. You can add pulses to soups, casseroles and meat sauces to add extra texture and flavor. This means you can use less meat, which makes the dish lower in fat and cheaper.

We have to choose the word which is similar to the emboldened word and replace it. 

Audacity: willingness to take bold risks; rude or disrespectful behaviour; impudence. 

Insolence: rude and disrespectful behaviour