Politics --- been one of the debatable topics. (a) is (b) has (c) have (d)are​

Each item in this section has a sentence with three underlined parts labelled (a), (b) and (c). Read each sentence to find out whether there is any error in any underlined part and indicate your response in the Answer Sheet against the corresponding letter i.e., (a) or (b) or (c). If you find no error, your response should be indicated as ( d). ("If you have thought about the alternatives,")/("(a)")" "("you would not have chosen")/("(b)")" "("such a difficult topic for the term paper.")/("(c)")" "("No error.")/("(d)")

Where has the world's largest monolithic statue of Buddha been installed ? (a) Bamiyan (b) Hyderabed (c) Kandy (d) Lhasa

What do the following symbols used in the topic on heredity represent ? (a) TT (b) tt (c) XX (d) XY