[amp_mcq option1=”1218″ option2=”1438″ option3=”1248″ option4=”1198 E. None of the above” correct=”option3″]
The correct answer is $\boxed{\text{C) 1248}}$.
To convert a decimal number to octal, you divide the decimal number by 8 repeatedly, and write down the remainders in reverse order.
For example, to convert 99 to octal:
$$99 \div 8 = 12 \text{ R } 3$$
$$12 \div 8 = 1 \text{ R } 4$$
$$1 \div 8 = 0 \text{ R } 1$$
So, the octal equivalent of 99 is $124_8$.
In this case, 9910 is equivalent to $1248_8$.
Option A is incorrect because $1218_8$ is not equal to 9910.
Option B is incorrect because $1438_8$ is not equal to 9910.
Option D is incorrect because $1198_8$ is not equal to 9910.
Option E is incorrect because $\boxed{\text{C) 1248}}$ is the only option that is equal to 9910.