beryllium, Be potassium, K titanium, Ti yttrium, Y
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: Based on their locations in the periodic table, which element has chemical properties most similar to those of calcium, Ca?
Possibilities:
- beryllium, Be
- potassium, K
- titanium, Ti
- yttrium, Y

beryllium, Be