Correct option is A
Prismoidal formula (Simpon's rule is used)
Valid for odd number of offset and number of division is even.
• For irregular boundaries, Simpson's rule is preferred over the trapezoidal rule to calculate the given area.
• In the case of an even number of cross-sections, the end strip is treated separately and
the area of the remaining strip is calculated by Simpson's rule. The area of the last strip may be calculated by trapezoidal formula. Prismoidal correction The difference between the volume computed by the trapezoidal formula and the prismoidal formula is known as a prismoidal correction.
Since the trapezoidal formula always over estimates the volume. Prismoidal correction is always subtractive in nature.
