Step 1: Core foreign-policy aims.
Independent India’s foreign policy emphasizes sovereignty, territorial integrity, strategic autonomy, peaceful coexistence (Panchsheel), and developmental interests including external trade/investment.
Step 2: Distinguish domestic economic reform from foreign-policy objectives.
Liberalisation (Option D) refers to India’s domestic economic policy shift in 1991 (deregulation, privatization, openness), not a {stated objective} of external policy—even though foreign policy can support development.
Step 3: Conclude.
\[
\boxed{\text{Promote liberalisation of economy (Option D) is {not} a core foreign-policy objective.}}
\]