In this task, find the most appropriate number to replace the blank (indicated with _ ) and express it in words.

[EX Q]: Titanium is found in column _ along with chemically similar zirconium, hafnium, and thorium.
[EX A]: four

[EX Q]: Angiosperms are divided into _ groups- monocots and dicots.
[EX A]: two

[EX Q]: Blood contains _ types of cells - red and white.
[EX A]:
two