The pair of radicals that is a like pair is \(7\sqrt{3}\) and \(9 \sqrt{3}\)
Option C is correct
For two radicals to be similar, they must contain the same number in the root operator.
Two like radicals are in the form:
\(a\sqrt{b}\) and \(c \sqrt{b}\)
Since \(a\sqrt{b}\) and \(c \sqrt{b}\) are like terms, arithmetic operations such as addition, subtraction, multiplication, and division can be carried out on them
Considering the options given, only \(7\sqrt{3}\) and \(9 \sqrt{3}\) are in the form \(a\sqrt{b}\) and \(c \sqrt{b}\) because they have equal value inside the root operator.
Therefore, the pair of radicals that is a like pair is \(7\sqrt{3}\) and \(9 \sqrt{3}\)
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