Which of the following statement about carbon fibres are correct ? 1. They can be made from viscose rayon<br> 2. They can used for making more tips of missile.<br> 3. They have low internal conductivity and used as insulators.<br> 4. They are used for making compounds of bone plates.

Question

$(a)\;1\;and\;2 \\ (b)\; 2\;and\;3 \\(c)\;1,2\;and\;4 \\ (d)\;1,2\;and\;3$