In the following question, some part of the sentence may have errors. Find out which part of the sentence has an error and select the appropriate option. If a sentence is free from error, select 'No Error'. In 1961, a meteoroid was defined as "a solid object moving in (1)/ interplanetary space, of a size considerably smaller than (2)/ an asteroid and considerably larger then an atom". (3)/ No error (4)?

Option 3 : 3

The correct answer is Option 3 i.e. 'error lies in part 3 of the sentence.'

In a given sentence, the usage of 'then' is incorrect Instead of it use 'than'

• According to the grammar rule, 'Than' is a conjunction which is used to show the comparison, and 'Then' is an adverb that is used to show the point of time.
• Let's see some examples:
  • I spent years on the dole trying to get bands together and I never worried about money then. 
  • The arrangement was more a formality than a genuine partnership of two nations.

So the correct sentence is:
In 1961, a meteoroid was defined as "a solid object moving in interplanetary space, of a size considerably smaller than an asteroid and considerably larger than an atom".