DIRECTIONS: Read the passage given below and answer the questions that follow. Passage-2 The smallest time interval that can be measured with commonly available clocks and watches is one second. However now special clocks are available that can measure time intervals smaller than a second. Some of these can measure time intervals as small as one millionth or even one billionth of a second. A micro-second is a very small time interval. It is equal to

• A. one thousandth of a second
• B. one hundredth of a second
• C. one millionth of a second
• D. one billionth of a second