Cual línea de código genera error?

Question

a. 3 + 4

b. “one” + “2”

c. Ninguno de los incisos genera un error.

d.  ‘5’ + 6

e. “7” + ‘eight’

https://www.sololearn.com/discuss/2240675/?ref=app
https://www.sololearn.com/discuss/2240289/?ref=app
https://www.sololearn.com/discuss/2239399/?ref=app
https://www.sololearn.com/discuss/2240101/?ref=app
https://www.sololearn.com/discuss/2241450/?ref=app
https://www.sololearn.com/discuss/2241129/?ref=app
https://www.sololearn.com/discuss/2240625/?ref=app
https://www.sololearn.com/discuss/2240122/?ref=app
https://www.sololearn.com/discuss/2240315/?ref=app
https://www.sololearn.com/discuss/2240766/?ref=app
https://www.sololearn.com/discuss/2240382/?ref=app
https://www.sololearn.com/discuss/2241214/?ref=app
https://www.sololearn.com/discuss/2239423/?ref=app
https://www.sololearn.com/discuss/2238783/?ref=app
https://www.sololearn.com/discuss/2239036/?ref=app
https://www.sololearn.com/discuss/2240508/?ref=app
https://www.sololearn.com/discuss/2239229/?ref=app
https://www.sololearn.com/discuss/2239942/?ref=app
http

Answer 1

a que vienen todos esos links?

Answer 2

respondiendo tu pregunta la linea d genera error ya que no puedes sumar una string con un int.
suponiendo que estas hablando de python claro