4601: A body is attached to a spring balance suspended from a stand. The reading on the balance is 0.5 kg. The two together are detached from the stand and allowed to fall through a height. While falling the reading in the balance will be
(a) Zero
(b) Less than 0.5 kg but not zero
(c) More than 0.5 kg depending on the height
(d) 0.5 kg