$\begin{array}{1 1} \text{a. Assimilatory roots capable of photosynthesis are present in Tinospora and Trapa} \\ \text{b. Haustoria of Cuscuta make connections with both xylem and phloem tissues of host} \\ \text{c. Reproductive roots of Ipomoea batata help in vegetative propagation} \\ \text{d. Epiphytic roots of vanda possess well developed root caps and root hairs} \end{array} $