Assertion (A) is established as true; foreign investment caps in Indian banks were raised to 74% as part of the 1991 financial reforms.
Reason (R) is also factually correct, with Foreign Institutional Investors (FIIs) gaining permission to invest in Indian financial markets after 1991. Nevertheless, Reason (R) does not provide a direct causal link to Assertion (A), as the reforms involved a wider spectrum of financial liberalization beyond solely foreign investment.