(d) Rs 9650
Let the annual income of the person be Rs x,
Then, 20% of (x – 1,00,000) = 3160
\(\Rightarrow\)x - 1,00,000 = \(\frac{3160\times100}{20}\) = 15800
\(\Rightarrow\) x = 115800
\(\therefore\) Monthly income = Rs \(\frac{115800}{12}\) = Rs 9650