what type of trap is used for a bath tub?\na. s - trap\nb. bell trap\nc. sand trap\nd. solid trap

Brief Explanations:

A bell trap is commonly used for a bathtub. An S - trap is often used in other plumbing setups but has some code - related issues in many areas. A sand trap is more related to areas where sand might accumulate (like in some outdoor or specific industrial - like drainage, not a bathtub). A solid trap is not a standard plumbing trap type for a bathtub.

Answer:

B. Bell trap