(a)$\mathrm{C}_{3}, \sigma_{\mathrm{v}}, \sigma_{\mathrm{h}}, 3 \mathrm{C}_{2}$
(b)$\mathrm{C}_{3}, 3 \mathrm{C}_{2}, \mathrm{S}_{2}, \sigma_{\mathrm{v}}$
(c)$\mathrm{C}_{3}, 3 \mathrm{C}_{2}, \sigma_{\mathrm{h}}, \mathrm{S}_{2}$
(d)$\mathrm{C}_{3}, \sigma_{\mathrm{h}}, \sigma_{\mathrm{v}}, \mathrm{i}$