A switching function f (A, B, C, D) = A′B′CD + A′BC′D

A switching function
f (A, B, C, D) = A′B′CD + A′BC′D + A′BCD + AB′C′D + AB′CD
can also be written as—

1. Σ m (1, 3, 5, 7, 9)
2. Σ m (3, 5, 7, 9, 11)
3. Σ m (3, 5, 9, 11, 13)
4. Σ m (5, 7, 9, 11, 13)

Σ m implies minterm which are SOP form (already in that form in question) Hence:

Hence alternative (B) is the correct answer.