Arithmetic progression properties – UGC NET Question

Statements A, B and C provide the definition, nth term and sum formula for APs. Statement D is also correct because terms equidistant from the ends have the same average (equal to the average of first and last). Statement E is false since d = 0 gives a constant sequence, which is still an AP. Thus A, B, C and D only are correct.

Option A:
Option A is incomplete as it omits D (symmetry property).

Option B:
Option B is incomplete because it omits B (nth term formula), so it misses a core true statement.

Option C:
Option C is incomplete since it omits A (definition), so it does not include the full true set.

Option D:
Option D is correct because it unites all true statements and excludes E (false).