The war of Mahabharata (a) / is the full length illustration (b) / of a righteous war (c) / No error (d)

Solution

In the sentence given, "The war of Mahabharata" is incorrect because "Mahabharata" is a proper noun (name of an epic), so it requires the definite article "the" when using the possessive form ("of the"). The correct alternative would be "war of the Mahabharata" or simply "the Mahabharata war".

The correct answer in this case is therefore option A.