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According to Lenz's law, the induced current creates a magnetic field that opposes the change in magnetic flux.
In figure (a), the magnetic field

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Anticlockwise, Anticlockwise

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According to Lenz's law, the induced current creates a magnetic field that opposes the change in magnetic flux.
In figure (a), the magnetic field is directed into the page $(	imes)$ and is increasing. To oppose this increase, the induced current must create a magnetic field directed out of the page $(\bullet)$. According to the right-hand rule, an outward magnetic field corresponds to an anticlockwise current.
In figure (b), the magnetic field is directed out of the page $(\bullet)$ and is decreasing. To oppose this decrease, the induced current must create a magnetic field into the page $(	imes)$. According to the right-hand rule, this corresponds to a clockwise current.
Therefore, the direction of current in ring (a) is anticlockwise and in ring (b) is clockwise.

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