Literary work                                          Author 

1. Vikramankadeva-charita                 : Padmagupta 
2. Rama-charita                                      : Ballala
3. Bhojaprabandha                                : Bilhana
4. Kumarapala-charita                          : Hemachandra

How many of the above pairs are correctly matched?

1. The political and cultural unity of India was attained during the reign of Ashoka.

2. The use of monumental stone sculpture can be dated to the period of the Indus Valley Civilisation.

3. Of all the Ashokan inscriptions, the Major Rock Edicts are considered the earliest inscription.

How many of the above statements is/are correct?