Option a is the correct answer. Saka era: This era is considered to start from 78 CE. Vikrama era: This era is considered to start from 57 BCE. To convert Saka year to Vikrama Samvat, we use the following formula: Vikrama Samvat year = = (Saka year + 135). Substituting the values, we get: Vikrama Samvat year = ( 465 + 135 ) = 600 =(465+135)=600. However, since the Saka year begins in March and the Vikrama Samvat year begins in April, we need to add one more year to get the correct answer. Therefore, the Badami rock inscription of Pulakesin I will be dated in Vikrama Samvat year 601.