You want to know the price of something so you say, ____ ?

Now that we have succeeded in isolating this drug and discovering its nature, our next problem is to plan its_______________ in the laboratory. Fill in the blank-

Choose the alternative A,B,C or D that best completes the sentence: Rajiv failed because his answers were not ___________ to the questions asked.

Choose the word which fits best in the text. He....to his men about the distance travelled each day.