Mitochondria

Reference: NCERT Class XI, page 97.

Mitochondria are the site of aerobic oxidation of carbohydrates to generate ATP.

A mitochondrion is bounded by two membranes; the inner membrane forms a number of infoldings called cristae towards the matrix, which increase the surface area. So 'inner membrane – forms infoldings called cristae' is correct.
The single circular DNA molecule, a few RNA molecules and the 70S ribosomes are present in the matrix, not on the cristae.
The enzymes of the respiratory chain (electron transport system) are located on the inner membrane; the matrix contains the enzymes of the Krebs cycle.
The outer membrane forms the continuous limiting boundary of the organelle; it does not give rise to the inner membrane by splitting.
Hence the correctly matched part is (B) : inner membrane – forms infoldings called cristae.

Mitochondria (and chloroplasts) are semi-autonomous organelles.
The mitochondrial matrix contains a single circular DNA molecule, a few RNA molecules and 70S ribosomes, so mitochondria can make some of their own proteins and divide by fission.
Peroxisomes, dictyosomes (Golgi bodies) and lysosomes are single-membrane organelles without any DNA.
Hence the mitochondrion has its own DNA.

A mitochondrion is bounded by two membranes, an outer membrane and an inner membrane.
The enzymes and carriers of the electron transport chain, along with ATP synthase, are embedded in the inner mitochondrial membrane, not in the outer membrane.
So the statement that the enzymes of the electron transfer chain are embedded in the outer membrane is not correct.
The inner membrane is highly convoluted, forming a series of infoldings called cristae, which increase its surface area.
The outer membrane contains channel proteins called porins, which make it freely permeable to small molecules; it is therefore described as resembling a sieve.
The other three statements are thus accepted as correct.