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# The number of arbitrary constants in the general solution of a differential equation of fourth order are

$(A)\;0\qquad(B)\;2\qquad(C)\;3\qquad(D)\;4$

Toolbox:
• The number of arbitrary constants in a solution of a differential equation of order n is equal to its order.
In the given problem says the differential equation is of fourth order, so the number of arbitrary constants is 4.
Hence the correct answer is $D$.