1. Arduino GPIO Programming

Analyze the given code and circuit diagram. When will the LED turn ON?

void setup() {
  pinMode(13, OUTPUT);
}

void loop() {
  digitalWrite(13, LOW);
}

void setup() {
  pinMode(13, OUTPUT);
}

void loop() {
  digitalWrite(13, HIGH);
}

void setup() {
  pinMode(13, INPUT);
}

void loop() {
  digitalWrite(13, HIGH);
}

void setup() {
  pinMode(13, INPUT_PULLUP);
}

void loop() {
  digitalWrite(13, HIGH);
}