SSC CGL Tier 2 Exam 12 Jan 2017 Paper 2

Directions (146-170) : In the following passages some of the words have been left out. Read each passage carefully and choose the correct answer for the given blank out of the four alternatives.
Passage-I(Q. Nos. 146–150)
It so haappens that (146) siblings sing one of (147) invariably has a less (148) vocal prowess even though (149) have a similarly commendable (150) base.