Nuclear fission and radioactive radiations

2024 Re-NEET 1 question

1. Select the correct statements among the following: A. Slow neutrons can cause fission in $^{235}_{92}U$ than fast neutrons. B. $\alpha$-rays are Helium nuclei. C. $\beta$-rays are fast moving electrons or positrons. D. $\gamma$-rays are electromagnetic radiations of wavelengths larger than X-rays. Choose the most appropriate answer from the options given below.