(b) 10000
Average income of Country A = (10500 + 9800 + 9500 + 10000 + 10500) ÷ 5 = 50300 ÷ 5 = Rs 10,060
Wait — the correct calculation gives 10,060, so the answer is (d) 10060.
Add all five incomes: 10500 + 9800 + 9500 + 10000 + 10500 = 50,300. Divide by 5 = 10,060. Students often make arithmetic errors here — write out the addition step clearly in the exam. Option (d) is correct.