Step 1: Concept Identification:
This question pertains to the 'Vriddhi Sandhi' rule within vowel sandhi. The governing sutra for Vriddhi Sandhi is 'Vriddhirechi'.
Step 2: Core Rule:
The rule for Vriddhi Sandhi states: If 'a' or 'aa' is followed by 'e' or 'ai', both combine to form 'ai'. Similarly, if 'a' or 'aa' is followed by 'o' or 'au', both combine to form 'au'.\[ aa + e \rightarrow ai \]Step 3: Application:
The words provided are 'Vidya' and 'Eshana'.
The final vowel of the first word ('Vidya') is 'aa'. (Vidy + aa)
The initial vowel of the second word ('Eshana') is 'e'.
According to the Vriddhi Sandhi rule, 'aa' and 'e' will combine to form 'ai'.\[ Vidya + Eshana \rightarrow Vidy + (aa + e) + shana \rightarrow Vidy + ai + shana \rightarrow Vidyaiṣaṇā \]Step 4: Conclusion:
Therefore, combining 'Vidya' and 'Eshana' results in the word 'Vidyaiṣaṇā'.