35. For a cubic crystal structure which one of the following relations indicating the cell characteristics is correct?

35. For a cubic crystal structure which one of the following relations indicating the cell characteristics is correct?

\( (a)\ a \neq b \neq c \text{ and } \alpha = \beta = \gamma = 90^\circ \)

\( (b)\ a = b = c \text{ and } \alpha \neq \beta \neq \gamma = 90^\circ \)

\( (c)\ a = b = c \text{ and } \alpha = \beta = \gamma = 90^\circ \)

\( (d)\ a \neq b \neq c \text{ and } \alpha \neq \beta \text{ and } \gamma \neq 90^\circ \)

Answer :  \( (c)\ a = b = c \text{ and } \alpha = \beta = \gamma = 90^\circ \)