In the following question, there are two sentences which are divided into four parts. Choose the fragment that carries an error (if any). Ignore punctuation errors if any.
Mao knew that communism in its classical form / will not gel into agrarian Chinese society. / Hence, he redefined Marxism so that it would be / in sync with local needs and practiced it in a way that suited China.
will not gel into agrarian Chinese society.
'will not gel' into is non-standard and has no meaning. 'gel' as a verb means to solidify or set. 'Gel with' is generally used colloquially. In a formal text, it is an error. The second error is in the tense ‘will not’ should be changed to ‘would not'.