Transorthogonal code is obtained by
(a) Deleting last digit of each orthogonal codeword
(b) Deleting first digit of each orthogonal codeword
(c) Doubling each digit of orthogonal codeword
(d) Taking negative of each digit of orthogonal codeword
The question was posed to me in an interview for internship.
My doubt is from Waveform Coding topic in chapter Channel Coding of Digital Communications