It was then he (i)____ (hear) the jostle and squeal of elephants. Below him on each side of
(ii)____ shallow river-bed, the elephants traveled. He could see the cows and babies and one
great old tusker. He (iii)____(play) his trunk to and fro to learn whatever the breeze could tell
him, (iv)___ suddenly he hesitated.

Fill in the blank (iii) with appropriate tense?
a) play
b) was playing
c) was played
d) playing