All elements in the same group

a) have similar chemical properties.

b) are not similar in any way.

c) are in the same state at room temperature.

d) have the same boiling and freezing points.

update

it was a

All the elements in the same group have similar chemical properties.

Explanation:

In a periodic table, elements are arranged in 18 vertical columns known as groups and 7 horizontal rows known as periods.

Elements arranged in a group show similar chemical properties because of the presence of same number of valence electrons.

For Example: Sodium and potassium react with water vigorously as they belong to same group which is Group 1.

Hence, all the elements in the same group have similar chemical properties.

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b.

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