Which of the following sets of information is sufficient to prove that two right-angled triangles are congruent by RHS?
(a) The triangles are right-angled; their hypotenuse and one corresponding acute angle are equal.
(b) The triangles are right-angled; one corresponding acute angle and the side opposite to it are equal.
(c) The triangles are right-angled; their hypotenuse and one corresponding side are equal.
(d) The triangles are right-angled; their two acute angles and one corresponding side are equal.