Concept:An Arithmetic Progression (A.P.) is a sequence where each term after the first is obtained by adding a fixed common difference. The nth term formula is Tn=a+(n−1)d.Explanation:The first term is a=−6.The common difference is d=T2−T1=−1−(−6)=5.We need the 17th term, so n=17.Using the formula: T17=a+(17−1)d=−6+16×5.T17=−6+80=74.Answer:The 17th term is 74, which corresponds to option C.