WHAT CHORD IS MAJOR
O A C# E
O A C E
O F Ab C
O A Cb E

The chord that is major is the first one.

Explanation:

The second option is minor

The third option is also minor

And the fourth one is sharp 3rd.

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pitch- the definition of pitch is as follows:

"the quality of a sound governed by the rate of vibrations producing it; the degree of highness or lowness of a tone."