Answer:
The correct option is a.
Step by step explanation:
The given number is

In the given number two digits are on the left side of the decimal and 6 digits on the right side of the decimal.
We have to round the given number to four significant digits. The left side of the decimal will remains the same but the right side of the decimal will rounded to two decimal places.
Find third digit after decimal. If third digit is greater than 5, then add 1 in second digit. If third digit is less than or equal to 5, then second digit will remains same.
Since third digit is 7, therefore the second digit will become


Therefore option a is correct.