WILL MARK BRAINLIEST!!!! HELP ASAP!!!!!

1. Which of the following is an igneous rock?

a. slate
b. limestone
c. calcite
d. basalt

2. Which of the following is a metamorphic rock?

a. shale
b. marble
c. sandstone
d. quartz

3. Most sandstone is made of:

a. calcite
b. clay minerals
c. silt grains
d. quartz crystals